A field is a placeholder for data whose contents can change.
Placeholder text is an additional indication, explanation, or example of the data needed for a certain field that is contained inside a form field. A replacement is a character, word, or set of characters that temporarily replaces the final data in computer programming. For instance, a programmer might be aware that she needs a specific number of numbers or variables, but she is unsure of what to enter. It is not recommended to substitute a placeholder attribute for a label. The placeholder should not be the same as the label element because it is a brief cue designed to help the user enter data.
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